u-boot/drivers/mmc/fsl_esdhc.c

1050 lines
26 KiB
C
Raw Normal View History

/*
* Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
* Andy Fleming
*
* Based vaguely on the pxa mmc code:
* (C) Copyright 2003
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <command.h>
#include <errno.h>
#include <hwconfig.h>
#include <mmc.h>
#include <part.h>
#include <malloc.h>
#include <fsl_esdhc.h>
#include <fdt_support.h>
#include <asm/io.h>
#include <dm.h>
#include <asm-generic/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
#define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \
IRQSTATEN_CINT | \
IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \
IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \
IRQSTATEN_DINT)
struct fsl_esdhc {
uint dsaddr; /* SDMA system address register */
uint blkattr; /* Block attributes register */
uint cmdarg; /* Command argument register */
uint xfertyp; /* Transfer type register */
uint cmdrsp0; /* Command response 0 register */
uint cmdrsp1; /* Command response 1 register */
uint cmdrsp2; /* Command response 2 register */
uint cmdrsp3; /* Command response 3 register */
uint datport; /* Buffer data port register */
uint prsstat; /* Present state register */
uint proctl; /* Protocol control register */
uint sysctl; /* System Control Register */
uint irqstat; /* Interrupt status register */
uint irqstaten; /* Interrupt status enable register */
uint irqsigen; /* Interrupt signal enable register */
uint autoc12err; /* Auto CMD error status register */
uint hostcapblt; /* Host controller capabilities register */
uint wml; /* Watermark level register */
uint mixctrl; /* For USDHC */
char reserved1[4]; /* reserved */
uint fevt; /* Force event register */
uint admaes; /* ADMA error status register */
uint adsaddr; /* ADMA system address register */
char reserved2[4];
uint dllctrl;
uint dllstat;
uint clktunectrlstatus;
char reserved3[84];
uint vendorspec;
uint mmcboot;
uint vendorspec2;
char reserved4[48];
uint hostver; /* Host controller version register */
char reserved5[4]; /* reserved */
uint dmaerraddr; /* DMA error address register */
char reserved6[4]; /* reserved */
uint dmaerrattr; /* DMA error attribute register */
char reserved7[4]; /* reserved */
uint hostcapblt2; /* Host controller capabilities register 2 */
char reserved8[8]; /* reserved */
uint tcr; /* Tuning control register */
char reserved9[28]; /* reserved */
uint sddirctl; /* SD direction control register */
char reserved10[712];/* reserved */
uint scr; /* eSDHC control register */
};
/**
* struct fsl_esdhc_priv
*
* @esdhc_regs: registers of the sdhc controller
* @sdhc_clk: Current clk of the sdhc controller
* @bus_width: bus width, 1bit, 4bit or 8bit
* @cfg: mmc config
* @mmc: mmc
* Following is used when Driver Model is enabled for MMC
* @dev: pointer for the device
* @non_removable: 0: removable; 1: non-removable
* @wp_enable: 1: enable checking wp; 0: no check
* @cd_gpio: gpio for card detection
* @wp_gpio: gpio for write protection
*/
struct fsl_esdhc_priv {
struct fsl_esdhc *esdhc_regs;
unsigned int sdhc_clk;
unsigned int bus_width;
struct mmc_config cfg;
struct mmc *mmc;
struct udevice *dev;
int non_removable;
int wp_enable;
#ifdef CONFIG_DM_GPIO
struct gpio_desc cd_gpio;
struct gpio_desc wp_gpio;
#endif
};
/* Return the XFERTYP flags for a given command and data packet */
static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp = 0;
if (data) {
xfertyp |= XFERTYP_DPSEL;
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
xfertyp |= XFERTYP_DMAEN;
#endif
if (data->blocks > 1) {
xfertyp |= XFERTYP_MSBSEL;
xfertyp |= XFERTYP_BCEN;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
xfertyp |= XFERTYP_AC12EN;
#endif
}
if (data->flags & MMC_DATA_READ)
xfertyp |= XFERTYP_DTDSEL;
}
if (cmd->resp_type & MMC_RSP_CRC)
xfertyp |= XFERTYP_CCCEN;
if (cmd->resp_type & MMC_RSP_OPCODE)
xfertyp |= XFERTYP_CICEN;
if (cmd->resp_type & MMC_RSP_136)
xfertyp |= XFERTYP_RSPTYP_136;
else if (cmd->resp_type & MMC_RSP_BUSY)
xfertyp |= XFERTYP_RSPTYP_48_BUSY;
else if (cmd->resp_type & MMC_RSP_PRESENT)
xfertyp |= XFERTYP_RSPTYP_48;
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
xfertyp |= XFERTYP_CMDTYP_ABORT;
return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
}
#ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
/*
* PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
*/
static void
esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data)
{
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
uint blocks;
char *buffer;
uint databuf;
uint size;
uint irqstat;
uint timeout;
if (data->flags & MMC_DATA_READ) {
blocks = data->blocks;
buffer = data->dest;
while (blocks) {
timeout = PIO_TIMEOUT;
size = data->blocksize;
irqstat = esdhc_read32(&regs->irqstat);
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_BREN)
&& --timeout);
if (timeout <= 0) {
printf("\nData Read Failed in PIO Mode.");
return;
}
while (size && (!(irqstat & IRQSTAT_TC))) {
udelay(100); /* Wait before last byte transfer complete */
irqstat = esdhc_read32(&regs->irqstat);
databuf = in_le32(&regs->datport);
*((uint *)buffer) = databuf;
buffer += 4;
size -= 4;
}
blocks--;
}
} else {
blocks = data->blocks;
buffer = (char *)data->src;
while (blocks) {
timeout = PIO_TIMEOUT;
size = data->blocksize;
irqstat = esdhc_read32(&regs->irqstat);
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_BWEN)
&& --timeout);
if (timeout <= 0) {
printf("\nData Write Failed in PIO Mode.");
return;
}
while (size && (!(irqstat & IRQSTAT_TC))) {
udelay(100); /* Wait before last byte transfer complete */
databuf = *((uint *)buffer);
buffer += 4;
size -= 4;
irqstat = esdhc_read32(&regs->irqstat);
out_le32(&regs->datport, databuf);
}
blocks--;
}
}
}
#endif
static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
{
int timeout;
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
#if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
dma_addr_t addr;
#endif
uint wml_value;
wml_value = data->blocksize/4;
if (data->flags & MMC_DATA_READ) {
if (wml_value > WML_RD_WML_MAX)
wml_value = WML_RD_WML_MAX_VAL;
esdhc_clrsetbits32(&regs->wml, WML_RD_WML_MASK, wml_value);
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
#if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
addr = virt_to_phys((void *)(data->dest));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
esdhc_write32(&regs->dsaddr, lower_32_bits(addr));
#else
esdhc_write32(&regs->dsaddr, (u32)data->dest);
#endif
#endif
} else {
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
flush_dcache_range((ulong)data->src,
(ulong)data->src+data->blocks
*data->blocksize);
#endif
if (wml_value > WML_WR_WML_MAX)
wml_value = WML_WR_WML_MAX_VAL;
if (priv->wp_enable) {
if ((esdhc_read32(&regs->prsstat) &
PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return -ETIMEDOUT;
}
}
esdhc_clrsetbits32(&regs->wml, WML_WR_WML_MASK,
wml_value << 16);
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
#if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
addr = virt_to_phys((void *)(data->src));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
esdhc_write32(&regs->dsaddr, lower_32_bits(addr));
#else
esdhc_write32(&regs->dsaddr, (u32)data->src);
#endif
#endif
}
esdhc_write32(&regs->blkattr, data->blocks << 16 | data->blocksize);
/* Calculate the timeout period for data transactions */
/*
* 1)Timeout period = (2^(timeout+13)) SD Clock cycles
* 2)Timeout period should be minimum 0.250sec as per SD Card spec
* So, Number of SD Clock cycles for 0.25sec should be minimum
* (SD Clock/sec * 0.25 sec) SD Clock cycles
* = (mmc->clock * 1/4) SD Clock cycles
* As 1) >= 2)
* => (2^(timeout+13)) >= mmc->clock * 1/4
* Taking log2 both the sides
* => timeout + 13 >= log2(mmc->clock/4)
* Rounding up to next power of 2
* => timeout + 13 = log2(mmc->clock/4) + 1
* => timeout + 13 = fls(mmc->clock/4)
*
* However, the MMC spec "It is strongly recommended for hosts to
* implement more than 500ms timeout value even if the card
* indicates the 250ms maximum busy length." Even the previous
* value of 300ms is known to be insufficient for some cards.
* So, we use
* => timeout + 13 = fls(mmc->clock/2)
*/
timeout = fls(mmc->clock/2);
timeout -= 13;
if (timeout > 14)
timeout = 14;
if (timeout < 0)
timeout = 0;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
if ((timeout == 4) || (timeout == 8) || (timeout == 12))
timeout++;
#endif
#ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
timeout = 0xE;
#endif
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
return 0;
}
static void check_and_invalidate_dcache_range
(struct mmc_cmd *cmd,
struct mmc_data *data) {
unsigned start = 0;
unsigned end = 0;
unsigned size = roundup(ARCH_DMA_MINALIGN,
data->blocks*data->blocksize);
#if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
dma_addr_t addr;
addr = virt_to_phys((void *)(data->dest));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
start = lower_32_bits(addr);
#else
start = (unsigned)data->dest;
#endif
end = start + size;
invalidate_dcache_range(start, end);
}
/*
* Sends a command out on the bus. Takes the mmc pointer,
* a command pointer, and an optional data pointer.
*/
static int
esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
int err = 0;
uint xfertyp;
uint irqstat;
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
return 0;
#endif
esdhc_write32(&regs->irqstat, -1);
sync();
/* Wait for the bus to be idle */
while ((esdhc_read32(&regs->prsstat) & PRSSTAT_CICHB) ||
(esdhc_read32(&regs->prsstat) & PRSSTAT_CIDHB))
;
while (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA)
;
/* Wait at least 8 SD clock cycles before the next command */
/*
* Note: This is way more than 8 cycles, but 1ms seems to
* resolve timing issues with some cards
*/
udelay(1000);
/* Set up for a data transfer if we have one */
if (data) {
err = esdhc_setup_data(mmc, data);
if(err)
return err;
if (data->flags & MMC_DATA_READ)
check_and_invalidate_dcache_range(cmd, data);
}
/* Figure out the transfer arguments */
xfertyp = esdhc_xfertyp(cmd, data);
2013-06-11 15:34:22 +00:00
/* Mask all irqs */
esdhc_write32(&regs->irqsigen, 0);
/* Send the command */
esdhc_write32(&regs->cmdarg, cmd->cmdarg);
#if defined(CONFIG_FSL_USDHC)
esdhc_write32(&regs->mixctrl,
(esdhc_read32(&regs->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F)
| (mmc->ddr_mode ? XFERTYP_DDREN : 0));
esdhc_write32(&regs->xfertyp, xfertyp & 0xFFFF0000);
#else
esdhc_write32(&regs->xfertyp, xfertyp);
#endif
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
/* Wait for the command to complete */
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
while (!(esdhc_read32(&regs->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
;
irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & CMD_ERR) {
err = -ECOMM;
goto out;
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
}
if (irqstat & IRQSTAT_CTOE) {
err = -ETIMEDOUT;
goto out;
}
/* Switch voltage to 1.8V if CMD11 succeeded */
if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) {
esdhc_setbits32(&regs->vendorspec, ESDHC_VENDORSPEC_VSELECT);
printf("Run CMD11 1.8V switch\n");
/* Sleep for 5 ms - max time for card to switch to 1.8V */
udelay(5000);
}
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
/* Workaround for ESDHC errata ENGcm03648 */
if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
int timeout = 6000;
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
/* Poll on DATA0 line for cmd with busy signal for 600 ms */
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
while (timeout > 0 && !(esdhc_read32(&regs->prsstat) &
PRSSTAT_DAT0)) {
udelay(100);
timeout--;
}
if (timeout <= 0) {
printf("Timeout waiting for DAT0 to go high!\n");
err = -ETIMEDOUT;
goto out;
mmc: fsl_esdhc: Poll until card is not busy anymore This patch imports parts of two patches from the Freescale U-Boot with the following commit messages: ENGR00156405 ESDHC: Add workaround for auto-clock gate errata ENGcm03648 http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787 The errata, not applicable to USDHC, causes ESDHC to shut off clock to the card when auto-clock gating is enabled for commands with busy signalling and no data phase. The card might require the clock to exit the busy state, so the workaround is to disable the auto-clock gate bits in SYSCTL register for such commands. The workaround also entails polling on DAT0 bit in the PRSSTAT register to learn when busy state is complete. Auto-clock gating is re-enabled at the end of busy state. ENGR00156670-1 ESDHC/USDHC: Remove delay before each cmd and some bug fixes http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=a77c6fec8596891be96b2cdbc742c9824844b92a Removed delay of 10 ms before each command. There should not be a need to have this delay after the ENGR00156405 patch that polls until card is not busy anymore before proceeding to next cmd. This patch imports the polling part of both patches. The auto-clock gating code don't apply for i.MX6 as implemented in these two patches. SYSCTL_RSTA was defined twice. Remove one definition. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> CC: Andy Fleming <afleming@freescale.com> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de>
2012-03-26 03:13:05 +00:00
}
}
/* Copy the response to the response buffer */
if (cmd->resp_type & MMC_RSP_136) {
u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
cmdrsp3 = esdhc_read32(&regs->cmdrsp3);
cmdrsp2 = esdhc_read32(&regs->cmdrsp2);
cmdrsp1 = esdhc_read32(&regs->cmdrsp1);
cmdrsp0 = esdhc_read32(&regs->cmdrsp0);
cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
cmd->response[3] = (cmdrsp0 << 8);
} else
cmd->response[0] = esdhc_read32(&regs->cmdrsp0);
/* Wait until all of the blocks are transferred */
if (data) {
#ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
esdhc_pio_read_write(mmc, data);
#else
do {
irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & IRQSTAT_DTOE) {
err = -ETIMEDOUT;
goto out;
}
if (irqstat & DATA_ERR) {
err = -ECOMM;
goto out;
}
} while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
/*
* Need invalidate the dcache here again to avoid any
* cache-fill during the DMA operations such as the
* speculative pre-fetching etc.
*/
if (data->flags & MMC_DATA_READ)
check_and_invalidate_dcache_range(cmd, data);
#endif
}
out:
/* Reset CMD and DATA portions on error */
if (err) {
esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
SYSCTL_RSTC);
while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
;
if (data) {
esdhc_write32(&regs->sysctl,
esdhc_read32(&regs->sysctl) |
SYSCTL_RSTD);
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD))
;
}
/* If this was CMD11, then notify that power cycle is needed */
if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V)
printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n");
}
esdhc_write32(&regs->irqstat, -1);
return err;
}
static void set_sysctl(struct mmc *mmc, uint clock)
{
int div, pre_div;
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
int sdhc_clk = priv->sdhc_clk;
uint clk;
if (clock < mmc->cfg->f_min)
clock = mmc->cfg->f_min;
if (sdhc_clk / 16 > clock) {
for (pre_div = 2; pre_div < 256; pre_div *= 2)
if ((sdhc_clk / pre_div) <= (clock * 16))
break;
} else
pre_div = 2;
for (div = 1; div <= 16; div++)
if ((sdhc_clk / (div * pre_div)) <= clock)
break;
pre_div >>= mmc->ddr_mode ? 2 : 1;
div -= 1;
clk = (pre_div << 8) | (div << 4);
#ifdef CONFIG_FSL_USDHC
esdhc_clrbits32(&regs->vendorspec, VENDORSPEC_CKEN);
#else
esdhc_clrbits32(&regs->sysctl, SYSCTL_CKEN);
#endif
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
udelay(10000);
#ifdef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN);
#else
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
#endif
}
#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
static void esdhc_clock_control(struct mmc *mmc, bool enable)
{
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
u32 value;
u32 time_out;
value = esdhc_read32(&regs->sysctl);
if (enable)
value |= SYSCTL_CKEN;
else
value &= ~SYSCTL_CKEN;
esdhc_write32(&regs->sysctl, value);
time_out = 20;
value = PRSSTAT_SDSTB;
while (!(esdhc_read32(&regs->prsstat) & value)) {
if (time_out == 0) {
printf("fsl_esdhc: Internal clock never stabilised.\n");
break;
}
time_out--;
mdelay(1);
}
}
#endif
static int esdhc_set_ios(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
/* Select to use peripheral clock */
esdhc_clock_control(mmc, false);
esdhc_setbits32(&regs->scr, ESDHCCTL_PCS);
esdhc_clock_control(mmc, true);
#endif
/* Set the clock speed */
set_sysctl(mmc, mmc->clock);
/* Set the bus width */
esdhc_clrbits32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
if (mmc->bus_width == 4)
esdhc_setbits32(&regs->proctl, PROCTL_DTW_4);
else if (mmc->bus_width == 8)
esdhc_setbits32(&regs->proctl, PROCTL_DTW_8);
return 0;
}
static int esdhc_init(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
int timeout = 1000;
/* Reset the entire host controller */
esdhc_setbits32(&regs->sysctl, SYSCTL_RSTA);
/* Wait until the controller is available */
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA) && --timeout)
udelay(1000);
#if defined(CONFIG_FSL_USDHC)
/* RSTA doesn't reset MMC_BOOT register, so manually reset it */
esdhc_write32(&regs->mmcboot, 0x0);
/* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */
esdhc_write32(&regs->mixctrl, 0x0);
esdhc_write32(&regs->clktunectrlstatus, 0x0);
/* Put VEND_SPEC to default value */
esdhc_write32(&regs->vendorspec, VENDORSPEC_INIT);
/* Disable DLL_CTRL delay line */
esdhc_write32(&regs->dllctrl, 0x0);
#endif
#ifndef ARCH_MXC
/* Enable cache snooping */
esdhc_write32(&regs->scr, 0x00000040);
#endif
#ifndef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
#else
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_HCKEN | VENDORSPEC_IPGEN);
#endif
/* Set the initial clock speed */
mmc_set_clock(mmc, 400000);
/* Disable the BRR and BWR bits in IRQSTAT */
esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
/* Put the PROCTL reg back to the default */
esdhc_write32(&regs->proctl, PROCTL_INIT);
/* Set timout to the maximum value */
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
#ifdef CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT
esdhc_setbits32(&regs->vendorspec, ESDHC_VENDORSPEC_VSELECT);
#endif
return 0;
}
static int esdhc_getcd(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
struct fsl_esdhc *regs = priv->esdhc_regs;
int timeout = 1000;
#ifdef CONFIG_ESDHC_DETECT_QUIRK
if (CONFIG_ESDHC_DETECT_QUIRK)
return 1;
#endif
#ifdef CONFIG_DM_MMC
if (priv->non_removable)
return 1;
#ifdef CONFIG_DM_GPIO
if (dm_gpio_is_valid(&priv->cd_gpio))
return dm_gpio_get_value(&priv->cd_gpio);
#endif
#endif
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
udelay(1000);
return timeout > 0;
}
static void esdhc_reset(struct fsl_esdhc *regs)
{
unsigned long timeout = 100; /* wait max 100 ms */
/* reset the controller */
esdhc_setbits32(&regs->sysctl, SYSCTL_RSTA);
/* hardware clears the bit when it is done */
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA) && --timeout)
udelay(1000);
if (!timeout)
printf("MMC/SD: Reset never completed.\n");
}
static const struct mmc_ops esdhc_ops = {
.send_cmd = esdhc_send_cmd,
.set_ios = esdhc_set_ios,
.init = esdhc_init,
.getcd = esdhc_getcd,
};
static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg,
struct fsl_esdhc_priv *priv)
{
if (!cfg || !priv)
return -EINVAL;
priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base);
priv->bus_width = cfg->max_bus_width;
priv->sdhc_clk = cfg->sdhc_clk;
priv->wp_enable = cfg->wp_enable;
return 0;
};
static int fsl_esdhc_init(struct fsl_esdhc_priv *priv)
{
struct fsl_esdhc *regs;
struct mmc *mmc;
u32 caps, voltage_caps;
if (!priv)
return -EINVAL;
regs = priv->esdhc_regs;
/* First reset the eSDHC controller */
esdhc_reset(regs);
#ifndef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
| SYSCTL_IPGEN | SYSCTL_CKEN);
#else
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_PEREN |
VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN);
#endif
writel(SDHCI_IRQ_EN_BITS, &regs->irqstaten);
memset(&priv->cfg, 0, sizeof(priv->cfg));
voltage_caps = 0;
caps = esdhc_read32(&regs->hostcapblt);
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
#endif
/* T4240 host controller capabilities register should have VS33 bit */
#ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
caps = caps | ESDHC_HOSTCAPBLT_VS33;
#endif
if (caps & ESDHC_HOSTCAPBLT_VS18)
voltage_caps |= MMC_VDD_165_195;
if (caps & ESDHC_HOSTCAPBLT_VS30)
voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
if (caps & ESDHC_HOSTCAPBLT_VS33)
voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
priv->cfg.name = "FSL_SDHC";
priv->cfg.ops = &esdhc_ops;
#ifdef CONFIG_SYS_SD_VOLTAGE
priv->cfg.voltages = CONFIG_SYS_SD_VOLTAGE;
#else
priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
#endif
if ((priv->cfg.voltages & voltage_caps) == 0) {
printf("voltage not supported by controller\n");
return -1;
}
if (priv->bus_width == 8)
priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
else if (priv->bus_width == 4)
priv->cfg.host_caps = MMC_MODE_4BIT;
priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
#ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
priv->cfg.host_caps |= MMC_MODE_DDR_52MHz;
#endif
if (priv->bus_width > 0) {
if (priv->bus_width < 8)
priv->cfg.host_caps &= ~MMC_MODE_8BIT;
if (priv->bus_width < 4)
priv->cfg.host_caps &= ~MMC_MODE_4BIT;
}
if (caps & ESDHC_HOSTCAPBLT_HSS)
priv->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
#ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
priv->cfg.host_caps &= ~MMC_MODE_8BIT;
#endif
priv->cfg.f_min = 400000;
priv->cfg.f_max = min(priv->sdhc_clk, (u32)52000000);
priv->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
mmc = mmc_create(&priv->cfg, priv);
if (mmc == NULL)
return -1;
priv->mmc = mmc;
return 0;
}
int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
{
struct fsl_esdhc_priv *priv;
int ret;
if (!cfg)
return -EINVAL;
priv = calloc(sizeof(struct fsl_esdhc_priv), 1);
if (!priv)
return -ENOMEM;
ret = fsl_esdhc_cfg_to_priv(cfg, priv);
if (ret) {
debug("%s xlate failure\n", __func__);
free(priv);
return ret;
}
ret = fsl_esdhc_init(priv);
if (ret) {
debug("%s init failure\n", __func__);
free(priv);
return ret;
}
return 0;
}
int fsl_esdhc_mmc_init(bd_t *bis)
{
struct fsl_esdhc_cfg *cfg;
cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
cfg->sdhc_clk = gd->arch.sdhc_clk;
return fsl_esdhc_initialize(bis, cfg);
}
#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
void mmc_adapter_card_type_ident(void)
{
u8 card_id;
u8 value;
card_id = QIXIS_READ(present) & QIXIS_SDID_MASK;
gd->arch.sdhc_adapter = card_id;
switch (card_id) {
case QIXIS_ESDHC_ADAPTER_TYPE_EMMC45:
value = QIXIS_READ(brdcfg[5]);
value |= (QIXIS_DAT4 | QIXIS_DAT5_6_7);
QIXIS_WRITE(brdcfg[5], value);
break;
case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY:
value = QIXIS_READ(pwr_ctl[1]);
value |= QIXIS_EVDD_BY_SDHC_VS;
QIXIS_WRITE(pwr_ctl[1], value);
break;
case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44:
value = QIXIS_READ(brdcfg[5]);
value |= (QIXIS_SDCLKIN | QIXIS_SDCLKOUT);
QIXIS_WRITE(brdcfg[5], value);
break;
case QIXIS_ESDHC_ADAPTER_TYPE_RSV:
break;
case QIXIS_ESDHC_ADAPTER_TYPE_MMC:
break;
case QIXIS_ESDHC_ADAPTER_TYPE_SD:
break;
case QIXIS_ESDHC_NO_ADAPTER:
break;
default:
break;
}
}
#endif
#ifdef CONFIG_OF_LIBFDT
__weak int esdhc_status_fixup(void *blob, const char *compat)
{
#ifdef CONFIG_FSL_ESDHC_PIN_MUX
if (!hwconfig("esdhc")) {
do_fixup_by_compat(blob, compat, "status", "disabled",
sizeof("disabled"), 1);
return 1;
}
#endif
do_fixup_by_compat(blob, compat, "status", "okay",
sizeof("okay"), 1);
return 0;
}
void fdt_fixup_esdhc(void *blob, bd_t *bd)
{
const char *compat = "fsl,esdhc";
if (esdhc_status_fixup(blob, compat))
return;
#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
do_fixup_by_compat_u32(blob, compat, "peripheral-frequency",
gd->arch.sdhc_clk, 1);
#else
do_fixup_by_compat_u32(blob, compat, "clock-frequency",
gd->arch.sdhc_clk, 1);
#endif
#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
do_fixup_by_compat_u32(blob, compat, "adapter-type",
(u32)(gd->arch.sdhc_adapter), 1);
#endif
}
#endif
#ifdef CONFIG_DM_MMC
#include <asm/arch/clock.h>
static int fsl_esdhc_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
fdt_addr_t addr;
unsigned int val;
int ret;
addr = dev_get_addr(dev);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->esdhc_regs = (struct fsl_esdhc *)addr;
priv->dev = dev;
val = fdtdec_get_int(fdt, node, "bus-width", -1);
if (val == 8)
priv->bus_width = 8;
else if (val == 4)
priv->bus_width = 4;
else
priv->bus_width = 1;
if (fdt_get_property(fdt, node, "non-removable", NULL)) {
priv->non_removable = 1;
} else {
priv->non_removable = 0;
#ifdef CONFIG_DM_GPIO
gpio_request_by_name_nodev(fdt, node, "cd-gpios", 0,
&priv->cd_gpio, GPIOD_IS_IN);
#endif
}
priv->wp_enable = 1;
#ifdef CONFIG_DM_GPIO
ret = gpio_request_by_name_nodev(fdt, node, "wp-gpios", 0,
&priv->wp_gpio, GPIOD_IS_IN);
if (ret)
priv->wp_enable = 0;
#endif
/*
* TODO:
* Because lack of clk driver, if SDHC clk is not enabled,
* need to enable it first before this driver is invoked.
*
* we use MXC_ESDHC_CLK to get clk freq.
* If one would like to make this function work,
* the aliases should be provided in dts as this:
*
* aliases {
* mmc0 = &usdhc1;
* mmc1 = &usdhc2;
* mmc2 = &usdhc3;
* mmc3 = &usdhc4;
* };
* Then if your board only supports mmc2 and mmc3, but we can
* correctly get the seq as 2 and 3, then let mxc_get_clock
* work as expected.
*/
priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
if (priv->sdhc_clk <= 0) {
dev_err(dev, "Unable to get clk for %s\n", dev->name);
return -EINVAL;
}
ret = fsl_esdhc_init(priv);
if (ret) {
dev_err(dev, "fsl_esdhc_init failure\n");
return ret;
}
upriv->mmc = priv->mmc;
priv->mmc->dev = dev;
return 0;
}
static const struct udevice_id fsl_esdhc_ids[] = {
{ .compatible = "fsl,imx6ul-usdhc", },
{ .compatible = "fsl,imx6sx-usdhc", },
{ .compatible = "fsl,imx6sl-usdhc", },
{ .compatible = "fsl,imx6q-usdhc", },
{ .compatible = "fsl,imx7d-usdhc", },
{ .compatible = "fsl,esdhc", },
{ /* sentinel */ }
};
U_BOOT_DRIVER(fsl_esdhc) = {
.name = "fsl-esdhc-mmc",
.id = UCLASS_MMC,
.of_match = fsl_esdhc_ids,
.probe = fsl_esdhc_probe,
.priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv),
};
#endif